A rear skirt hanging from the bumper, seems to me, would help the road grime and soot situation covering the front of my toad. I'm thinking of the one that looks similar to a hula skirt - see 'em on most of the UPS and FedX over the road trucks.

all the big rv motorhomes use them some are very nice with s/s trim why not on a bus ? john

John, they have to be "tuned" to the setup of each bus (at least the solid mudflaps do). If the bus has lots of outlets for the air and an air supply, putting a solid mudflap just behind the rear tires (and I mean all the way across the width of the bus, not just behind the tires) usually helps make a "vacuum bubble" to draw air out of the engine area. If there are good inlets but no way for hot air to get out of the engine bay except through the lower openings, putting a solid mud flap or curtain can create a high-pressure area that will interfere with air circulation. But the important part is that different kinds of buses are different - what works on one may not work on another and what gives trouble on one may not give trouble on another. But it's something that should be considered.

Plaxton Paramounts have a full-width rear skirt thing, although it doesn't reach down very far. I can't believe it's much good as a mudflap (and there are conventional mudflaps behind the wheels anyway), so it's very possible that it's something to do with airflow or air pressure for engine cooling. But my bus is mid-engineed with the radiator behind the front wheels, and yet I still have the skirt (I know it's there because it was in the way when the tow hitch was fitted).

Jeremy

(In this photo it looks like the Duple in the background has a skirt too)

Got a hula skirt on my 5A, also have a 2" mudflap behind each wheel and don't have an overheating problem unless it is 107 degrees out and i am going up the hill out of Laughlin headed to Vegas. 8V71N with 644 allison.